Critical slowing down in Zn-Mg-Ho quasicrystal

被引：1

作者：

Sugiyama, Jun ^{[1
]}

Nozaki, Hiroshi ^{[1
]}

Ansaldo, Eduardo J. ^{[2
]}

Morris, Gerald D. ^{[2
]}

Brewer, Jess H. ^{[2
,3
]}

Sato, Taku J. ^{[4
]}

机构：

[1] Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan

[2] TRIUMF, Vancouver, BC V6T 2A3, Canada

[3] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[4] Univ Tokyo, ISSP, Kashihara, Nara 2778581, Japan

来源：

12TH INTERNATIONAL CONFERENCE ON MUON SPIN ROTATION, RELAXATION AND RESONANCE (MUSR2011) | 2012年 / 30卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Amorphous and quasicrystalline magnetic materials; Critical-point effects; Muon-spin rotation and relaxation; DYNAMICS;

D O I：

10.1016/j.phpro.2012.04.071

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

By means of longitudinal field muon-spin spectroscopy, we have found a clear critical slowing down caused by spin fluctuation of Ho moments in the icosahedral quasicrystal (QC), i-ZnMgHo, with freezing temperature (T-f=1.95 K), for which the susceptibility showed an anomaly at 5 K. The difference is attributed to crystalline electric field (CEF) effects. The muons experience a broad, fluctuating, field distribution, of width Delta similar to 6.3 T around T-f. The effect of the CEF is also apparent in zero field and weak applied transverse field measurements, with an onset around 60 K. For the Cd-based QCs (CdMgHo and CdMgGd), which exhibited two freezing temperatures in the susceptibility, the change in fluctuation rate, i.e. freezing, occurs at the lower T-f.

引用

页码：194 / 197

页数：4